Performance assessment of a natural ventilator by different test methods

摘要

Natural ventilation systems in multi-family residential buildings should meet the needs of reducing ventilation heat loss as well as providing good indoor air quality. Therefore, it is important to estimate the adequate area of natural ventilation systems based on reasonable performance data. The purpose of this study is to measure the air flow rates of a natural ventilator by different test methods and to find out its performance in a full-scale test house. First, air flow rates of a natural ventilator were measured by fan pressurization method using the ventilation performance test rig in the laboratory. Secondly, air flow rates were also measured using an orifice blower door in the mock-up test room. Finally, the air change rates of a residential unit with natural ventilators were measured under different opening conditions. By comparing the measurement results from the different tests, several considerations and recommendations were also discussed for evaluating the performance of natural ventilators.